Hi all
I only discovered this site a few days ago and within that short time have learnt more about Evohome than I’ve gleaned from months of random reading so, as a lurker, I’d like to thank you all for your fantastic contributions. Having said that, please excuse what will appear my simplistic question.
Briefly, my situation is a 3 storey + cellars Victorian end terrace ie lots of stairs! Current gas usage typically 23K KwH on a WB Greenstar combi. That figure also includes gas range cooker. There are 14 rads all fitted with Drayton TRV4s. System is controlled wirelessly with a Drayton digistat programmable thermostat and a lot of legwork/twiddling.
Only complicating factor is a kitchen/ dining room which has wet UFH. When installed this was teed off the rad circuit (!) so currently is not independently controlled. The manifold obviously mixes the radiator water temperature down but as things stand it’s only on when the programmer is calling for heat and other radiators are on. The UFH wall stat will switch its circuit pump off and on as required but things are obviously not ideal. As a first step I’m having the floor’s flow & return routed directly back to the boiler shortly with an appropriate zone valve. S-plan seems to be the way to go.
I realise that any smart system will not inherently save any cash but it should make things a little more comfortable and way more convenient. I’m also looking for more stable temperature control within any room when it’s being heated. I’ve looked at Wiser, Tado and Evohome but rejected the first two for all of the well documented reasons. As a bonus my place naturally divides up into 12 zones so Honeywell it is. My only question relates to controlling the underfloor heating which effectively is a single zone. The Evohome UFH controller will handle 5 zones I think and is rather expensive and overkill for my needs.
I’m prepared to shell out the cash for the base pack and HR92s and wonder if I can use the Evo controller to handle all of the radiators while still using the digistat to program heating times for the floor. I can’t understand whether the boiler will be able to receive commands from two independent controllers. I appreciate that Evohome talks to a BDR91 boiler relay and wonder whether it’s possible to have 2 relays in parallel which can instruct the boiler separately?
Sorry for the long winded question! I know this has scenario has been touched on before
In several threads such as https://www.wordpress-1219309-438749...e-UFH-question but I wanted to be confident I was on the right lines before I commit to the Evohome kit.
I’d be really grateful for any help and please excuse my ignorance around basic plumbing layouts and this area of technology in general.
Jim
I only discovered this site a few days ago and within that short time have learnt more about Evohome than I’ve gleaned from months of random reading so, as a lurker, I’d like to thank you all for your fantastic contributions. Having said that, please excuse what will appear my simplistic question.
Briefly, my situation is a 3 storey + cellars Victorian end terrace ie lots of stairs! Current gas usage typically 23K KwH on a WB Greenstar combi. That figure also includes gas range cooker. There are 14 rads all fitted with Drayton TRV4s. System is controlled wirelessly with a Drayton digistat programmable thermostat and a lot of legwork/twiddling.
Only complicating factor is a kitchen/ dining room which has wet UFH. When installed this was teed off the rad circuit (!) so currently is not independently controlled. The manifold obviously mixes the radiator water temperature down but as things stand it’s only on when the programmer is calling for heat and other radiators are on. The UFH wall stat will switch its circuit pump off and on as required but things are obviously not ideal. As a first step I’m having the floor’s flow & return routed directly back to the boiler shortly with an appropriate zone valve. S-plan seems to be the way to go.
I realise that any smart system will not inherently save any cash but it should make things a little more comfortable and way more convenient. I’m also looking for more stable temperature control within any room when it’s being heated. I’ve looked at Wiser, Tado and Evohome but rejected the first two for all of the well documented reasons. As a bonus my place naturally divides up into 12 zones so Honeywell it is. My only question relates to controlling the underfloor heating which effectively is a single zone. The Evohome UFH controller will handle 5 zones I think and is rather expensive and overkill for my needs.
I’m prepared to shell out the cash for the base pack and HR92s and wonder if I can use the Evo controller to handle all of the radiators while still using the digistat to program heating times for the floor. I can’t understand whether the boiler will be able to receive commands from two independent controllers. I appreciate that Evohome talks to a BDR91 boiler relay and wonder whether it’s possible to have 2 relays in parallel which can instruct the boiler separately?
Sorry for the long winded question! I know this has scenario has been touched on before
In several threads such as https://www.wordpress-1219309-438749...e-UFH-question but I wanted to be confident I was on the right lines before I commit to the Evohome kit.
I’d be really grateful for any help and please excuse my ignorance around basic plumbing layouts and this area of technology in general.
Jim
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